leonard



No. 608,054. Patent ed July 26, I898.

F. P. LEONARD. FURNACE FUR HEATING BUILDINGS.

(Application and 1m. 12, 1898.,

(No Model.)

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lI o. 608,054. Patented July 26, I898.

' F. P. LEONARD.

FURNACE FOB HEATING BUILDINGS.

(Application filed Mar. 12,1898.) (No Model.) 2 Shady-Shea! 2.

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FL 1 SM" TATES TTED FRED P. LEoNARD, OF 'rAUNToN, MASSACHUSETTS, ASSIGNOR TO THE DIGHTON FURNACE COMPANY, on sAME PLACE.

FURNACE FOR HEATING BUILDINGS.

SPECIFICATION forming part of Letters Patent No. 608,054, dated July 26, 1898.

Application filed March 12, 1898. Serial No. 673,619. (No model.)

To ctZZ whom it may concern:

Be it known that I, FRE P. LEONARD, a citizen of the United States, residing in Taunton, in the county of Bristol and State of Massachusetts, have invented new and useful Improvements in Furnaces for Heating Buildin gs, of which the following is a specification.

.This invention relates to furnaces for heating buildings, and particularly to that part of the furnace termed in the trade the radiator or dome and it consists in a certain novel construction whereby the gases and products of combustion are caused to pass indirectly to the flue or chimney through curved ducts or passages formed by the shoulder or ledge at the bottom of the dome and removable plates extending diagonally from the-inner edge of said shoulder upward to and against the inner surface of the walls of the radiator or dome. These plates serve not only to complete curved indirect passages for the gases, but also act as coal-guards, preventing the coal from lodging on the shoulder. The plates, which simply rest in position, can be readily removed by drawing them through the feeddoor, so that the shoulder or ledge may be brushed off and cleaned.

The nature of the invention in detail is fully described below and illustrated in the accompanying drawings, in which- Figure 1 is a central vertical section of a furnace embodying my invention, the section being taken through the feed-door and escape-fines. Fig. 2 is a vertical section of the dome and aportion of the casing, taken centrally and at right angles to that illustrated in Fig. 1. Fig. 3 is a section taken on line X, Fig. 1. Fig. 4 is a perspective view of the curved plates removed and of the plate or shell which constitutes a connecting-flue between the inner ends of the curved plates and the flue leading indirectly to the chimney. 7 Similar letters of reference indicate correspondin g parts.

A represents the casing, B the ash-pit, O the coal-chamber or combustion-chamber, and D the radiator or dome, of a furnace.

E is the flue which constitutes the direct draft, and F F the fines which constitute the indirect draft thereof.

a is the feed-door.

A The parts above named are all constructed substantially as usual.

H is the floor or lower wall of the dome or radiator, which extends to and around the an upturned lip H. Supported by this shoulder or ledge H exactly opposite the feed-door a and in front of the flue F is a metallic structure consisting of the preferably curved portion or wall K, the portion K, at an obtuse angle with said portion K, and the walls K, all constituting one integral piece or casting. The lower edge of the wall K rests on the shoulder H and against the lip H, conforming in shape thereto. The portion K rests against and conforms in shape to the inner surface of the rear vertical wall of the radiator or dome above the flue F, and the side walls K are formed with substantially vertical edges is, Fig. 4, which rest against the inner surface of. the radiator on opposite sides of the flue F, and the receding edges which extend from the lower ends of the edges is to the lower end of the portion K, and thus constitute substantially triangular openings into the said structure at opposite sides thereof.

L L are two metallicplates, each formed with the concentric or parallel edges L and y L, Fig. 4, and with the substantially radial or right-angled en dsl and Z. Moreover, these plates are curved, as shown, in such a manner that the edges L rest on the shoulders or. ledges H against the upturned lips H and the edges L rest againstthe inner surface of the walls of the radiator D. The plates are of such a length and width that the rear ends Z correspond with and rest against the edges 7c of the walls K and the edges Z are near and on opposite sidesof the feed door a. Thus two curved passages are formed, one on each side of the furnace, leading from the front portion thereof around the edges to the passages in the opposite sides of the structure K K K, which connects with the indirect draft F F. It follows that in case the damper S of the direct draft E is closed the gases and products of combustion travel indirectly from points near the feed-door through curved passages above the-shoulders or ledges H to the passage or flue common to both curved passages and formed with the structure K K K, and thence into the indirect draft. These plates not only complete the indirect passages described, but serve to prevent the coal from lodging on the shoulder or ledge H. They are not intended to be secured rigidly tothe furnace, but rest by gravity in the position described and can be easily removed by drawing them out through the feed-door, so that the ledge or shoulder may be brushed off and cleaned. The plates may be of any desired length, and of course may be in one or more pieces on each side.

Having thus fully described my invention, What I claim, and desire to secure by Letters Patent, is

1. In a furnace of the character described, the combination with the fire-pot, the vertical Walls of the radiator or dome, and the bottom or shoulder H extending horizontally from and around the fire-pot at substantially the upper edge thereof; of the curved removable plates L extending diagonally from the upper surface of said shoulder near the inner edge thereof to and against the inner surface of said Walls and resting on the former and against the latter above and around the firepot, said plates being of substantially the shape shown and described and constituting coal-guards and in connection With said shoulder and alls constituting triangular curved flues above the fire-pot and connecting with the indirect draft, substantially as described.

2. In a furnace of the character described, the combination with the bottom or shoulder H provided at its inner edge with the upturned lip H, and the vertical Walls of the radiator or dome; of the curved plates L supported by said shoulder and with their lower edges resting against said lip and their upper edges against the inner surface of the Walls of the radiator, said plates extending from points on opposite sides of the feed-door to points on opposite sides of the inner end of the flue constituting the indirect draft; and a structure providing a passage from the rear ends of the said plates to said indirect draft, substantially as set forth.

3. In a furnace of the character described, the combination With the bottom or shoulder H provided at its inner edge with the upturned lip H, and the vertical Walls of the radiator or dome; of' the curved plates L supported by said shoulder and With their lower edges resting against said lip and their upper edges against the inner surface of the Walls of the radiator, said plates extending from points on opposite sides of the feed-door to points on opposite sides of the inner end of the flue constituting the indirect draft; and the intermediate flue consisting of the Wall K resting on said shoulder and against the lip, the Wall K extending from the Wall K to the inner surface of the dome or radiator above the entrance of the indirect draft F, and the side Walls K formed with the edges is which rest against the inner surface of the radiator on opposite sides of the opening to the indirect draft, and the edges k corresponding and coinciding with the inner ends of the curved plates, substantially as described.

FRED P. LEONARD.

Witnesses:

HENRY W. WILLIAMS, A. N. BONNEY. 

